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I had a hum problem with my Transporter and it turned out to be caused
by the TV cable. I installed an isolation transformer on the TV cable
and the hum went away.
See
http://www.audioholics.com/tweaks/connecting-your-system/ground-loops-eliminating-system-hum-and-buzz
for details.
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Ron
Ron, thanks for the suggestion. I tried that too and it didn't work for
me. I have a distribution box that feeds the Cable TV line into all the
rooms, do I need to disconnect the main TV cable line or just the one in
the room that I'm having the problem?
I'll try the steps in the article,
I'm a long time owner of three SB3 and one Transporter but this is my
first post. I've searched and found a couple threads pertaining to
ground-loop problems but none of the suggestions have help so I'm
wondering if I just need to get my Transporter serviced.
I'm currently using my Marantz